1
我要处理按键事件对所有的子控件,为此,我试图像下面的东西:如何在Qt中处理所有子窗口小部件的按键事件?
Widget::Widget(QWidget *parent):QWidget(parent)
{
QGroupBox *gBox = new QGroupBox(this);
QPushButton *button1 = new QPushButton("1");
QPushButton *button2 = new QPushButton("2");
QVBoxLayout *vBox = new QVBoxLayout;
vBox->addWidget(button1);
vBox->addWidget(button2);
gBox->setLayout(vBox);
gBox->installEventFilter(this);
button1->installEventFilter(this);
button2->installEventFilter(this);
}
bool Widget::eventFilter(QObject *obj, QEvent *event)
{
if (event->type() == QEvent::KeyPress)
{
if(obj == gBox)
{
QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
if(keyEvent->key() == Qt::Key_F1)
{
emit somesignal();
}
}
if(obj == button1)
{
QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
if(keyEvent->key() == Qt::Key_F1)
{
emit somesignal1();
}
}
if(obj == button2)
{
QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
if(keyEvent->key() == Qt::Key_F1)
{
emit somesignal2();
}
}
}
return QObject::eventFilter(obj, event);
}
但whwnever我按F1,只有somesignal()
被发射。我也想发出somesignal1()
,somesignal2()
,对于button1
和button2
。
有人可以帮助我实现这个目标吗?
您重复了'gBox-> installEventFilter(this);'3次。 – ilotXXI
您声明了'button1'两次,将它添加到布局两次,并在'gbox'上安装了三次事件过滤器。请提供实际的代码。 –
当您按下某些按键时,按钮是否有焦点? – thuga